Ungrateful Fake Sis Killed Me Reborn, Bullet Screen Helped Me Swap The Nanny's Baby To Rot

The ungrateful fake sister who killed me in my past life thought she could successfully swap my healthy baby with the nanny's sick child. Reborn, I used a futuristic floating bullet screen system to easily predict her moves and swapped the children back, leaving her own child to rot in her messy world.